Name: analysis of retinoic acid-induced neural differentiation of mouse embryonic stem cells in two and three-dimensional embryoid bodies
Uploaded: 2017-04-22T14:00:00
Description: Watch this Scientific Journal Video about Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies at JoVE.com

Denna studie stöddes av NIH bidrag R01 HL119984 till AH

1. Kultur av Mus Embryonala fibroblaster (MEF) <ol><li> Förbereda MEF-medium, Dulbeccos modifierade Eagles medium (DMEM, hög-glukos), kompletterat med 15% fetalt bovint serum (FBS). </li><li> Coat 100 mm cellodlingsskålar med 0,5% gelatinlösning under 30 min vid rumstemperatur (RT). </li><li> Räkna MEFs med användning av en cytometer. Avlägsna gelatinlösning och omedelbart häll MEF-medium förvärmas till 37 ° C. Snabbt tina ampuller med mitomycin C-behandlade MEFs i ett 37 ° C vattenbad under 2 minuter, d?...

<ol>
	<li>Hopfl, G., Gassmann, M., Desbaillets, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differentiating+embryonic+stem+cells+into+embryoid+bodies.">Differentiating embryonic stem cells into embryoid bodies.</a> Methods Mol Biol. 254, 79-98 (2004).</li><li>Itskovitz-Eldor, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differentiation+of+human+embryonic+stem+cells+into+embryoid+bodies+compromising+the+three+embryonic+germ+layers.">Differentiation of human embryonic stem cells into embryoid bodies compromising the three embryonic germ layers.</a> Mol Med. 6 (2), 88-95 (2000).</li><li>Dang, S. M., Kyba, M., Perlingeiro, R., Daley, G. Q., Zandstra, P. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Efficiency+of+embryoid+body+formation+and+hematopoietic+development+from+embryonic+stem+cells+in+different+culture+systems.">Efficiency of embryoid body formation and hematopoietic development from embryonic stem cells in different culture systems.</a> Biotechnol Bioeng. 78 (4), 442-453 (2002).</li><li>Johansson, S., Svineng, G., Wennerberg, K., Armulik, A., Lohikangas, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fibronectin-integrin+interactions.">Fibronectin-integrin interactions.</a> Front Biosci. 2, d126-d146 (1997).</li><li>Blumberg, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+essential+role+for+retinoid+signaling+in+anteroposterior+neural+specification+and+neuronal+differentiation.">An essential role for retinoid signaling in anteroposterior neural specification and neuronal differentiation.</a> Semin Cell Dev Biol. 8 (4), 417-428 (1997).</li><li>Ross, S. A., McCaffery, P. J., Drager, U. C., De Luca, L. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoids+in+embryonal+development.">Retinoids in embryonal development.</a> Physiol Rev. 80 (3), 1021-1054 (2000).</li><li>Bain, G., Ray, W. J., Yao, M., Gottlieb, D. I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+promotes+neural+and+represses+mesodermal+gene+expression+in+mouse+embryonic+stem+cells+in+culture.">Retinoic acid promotes neural and represses mesodermal gene expression in mouse embryonic stem cells in culture.</a> Biochem Biophys Res Commun. 223 (3), 691-694 (1996).</li><li>Okada, Y., Shimazaki, T., Sobue, G., Okano, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic-acid-concentration-dependent+acquisition+of+neural+cell+identity+during+in+vitro+differentiation+of+mouse+embryonic+stem+cells.">Retinoic-acid-concentration-dependent acquisition of neural cell identity during in vitro differentiation of mouse embryonic stem cells.</a> Dev Biol. 275 (1), 124-142 (2004).</li><li>Duester, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+synthesis+and+signaling+during+early+organogenesis.">Retinoic acid synthesis and signaling during early organogenesis.</a> Cell. 134 (6), 921-931 (2008).</li><li>Niederreither, K., Dolle, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+in+development:+towards+an+integrated+view.">Retinoic acid in development: towards an integrated view.</a> Nat Rev Genet. 9 (7), 541-553 (2008).</li><li>Maden, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+in+the+development,+regeneration+and+maintenance+of+the+nervous+system.">Retinoic acid in the development, regeneration and maintenance of the nervous system.</a> Nat Rev Neurosci. 8 (10), 755-765 (2007).</li><li>Sheng, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+regulates+bone+morphogenic+protein+signal+duration+by+promoting+the+degradation+of+phosphorylated+Smad1.">Retinoic acid regulates bone morphogenic protein signal duration by promoting the degradation of phosphorylated Smad1.</a> Proc Natl Acad Sci U S A. 107 (44), 18886-18891 (2010).</li><li>Gajovic, S., St-Onge, L., Yokota, Y., Gruss, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+mediates+Pax6+expression+during+in+vitro+differentiation+of+embryonic+stem+cells.">Retinoic acid mediates Pax6 expression during in vitro differentiation of embryonic stem cells.</a> Differentiation. 62 (4), 187-192 (1997).</li><li>Dong, D., Ruuska, S. E., Levinthal, D. J., Noy, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Distinct+roles+for+cellular+retinoic+acid-binding+proteins+I+and+II+in+regulating+signaling+by+retinoic+acid.">Distinct roles for cellular retinoic acid-binding proteins I and II in regulating signaling by retinoic acid.</a> J Biol Chem. 274 (34), 23695-23698 (1999).</li><li>Sessler, R. J., Noy, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+ligand-activated+nuclear+localization+signal+in+cellular+retinoic+acid+binding+protein-II.">A ligand-activated nuclear localization signal in cellular retinoic acid binding protein-II.</a> Mol Cell. 18 (3), 343-353 (2005).</li><li>Tang, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=SIRT1-Mediated+Deacetylation+of+CRABPII+Regulates+Cellular+Retinoic+Acid+Signaling+and+Modulates+Embryonic+Stem+Cell+Differentiation.">SIRT1-Mediated Deacetylation of CRABPII Regulates Cellular Retinoic Acid Signaling and Modulates Embryonic Stem Cell Differentiation.</a> Mol Cell. 55 (6), 843-855 (2014).</li><li>Yang, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=RhoA+inhibits+neural+differentiation+in+murine+stem+cells+through+multiple+mechanisms.">RhoA inhibits neural differentiation in murine stem cells through multiple mechanisms.</a> Sci Signal. 9 (438), ra76 (2016).</li><li>Garnaas, M. K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Syx,+a+RhoA+guanine+exchange+factor,+is+essential+for+angiogenesis+in+Vivo.">Syx, a RhoA guanine exchange factor, is essential for angiogenesis in Vivo.</a> Circ Res. 103 (7), 710-716 (2008).</li><li>Chou, Y. H., Khuon, S., Herrmann, H., Goldman, R. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nestin+promotes+the+phosphorylation-dependent+disassembly+of+vimentin+intermediate+filaments+during+mitosis.">Nestin promotes the phosphorylation-dependent disassembly of vimentin intermediate filaments during mitosis.</a> Mol Biol Cell. 14 (4), 1468-1478 (2003).</li><li>Arai, T., Matsumoto, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Subcellular+localization+of+functionally+differentiated+microtubules+in+squid+neurons:+regional+distribution+of+microtubule-associated+proteins+and+beta-tubulin+isotypes.">Subcellular localization of functionally differentiated microtubules in squid neurons: regional distribution of microtubule-associated proteins and beta-tubulin isotypes.</a> J Neurochem. 51 (6), 1825-1838 (1988).</li><li>Arnhold, S., Klein, H., Semkova, I., Addicks, K., Schraermeyer, U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neurally+selected+embryonic+stem+cells+induce+tumor+formation+after+long-term+survival+following+engraftment+into+the+subretinal+space.">Neurally selected embryonic stem cells induce tumor formation after long-term survival following engraftment into the subretinal space.</a> Invest Ophthalmol Vis Sci. 45 (12), 4251-4255 (2004).</li><li>Liu, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid+receptor+beta+mediates+the+growth-inhibitory+effect+of+retinoic+acid+by+promoting+apoptosis+in+human+breast+cancer+cells.">Retinoic acid receptor beta mediates the growth-inhibitory effect of retinoic acid by promoting apoptosis in human breast cancer cells.</a> Mol Cell Biol. 16 (3), 1138-1149 (1996).</li><li>Altucci, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoic+acid-induced+apoptosis+in+leukemia+cells+is+mediated+by+paracrine+action+of+tumor-selective+death+ligand+TRAIL.">Retinoic acid-induced apoptosis in leukemia cells is mediated by paracrine action of tumor-selective death ligand TRAIL.</a> Nat Med. 7 (6), 680-686 (2001).</li><li>Pettersson, F., Dalgleish, A. G., Bissonnette, R. P., Colston, K. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinoids+cause+apoptosis+in+pancreatic+cancer+cells+via+activation+of+RAR-gamma+and+altered+expression+of+Bcl-2/Bax.">Retinoids cause apoptosis in pancreatic cancer cells via activation of RAR-gamma and altered expression of Bcl-2/Bax.</a> Br J Cancer. 87 (5), 555-561 (2002).</li><li>Kothapalli, C. R., Kamm, R. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=3D+matrix+microenvironment+for+targeted+differentiation+of+embryonic+stem+cells+into+neural+and+glial+lineages.">3D matrix microenvironment for targeted differentiation of embryonic stem cells into neural and glial lineages.</a> Biomaterials. 34 (25), 5995-6007 (2013).</li><li>Cai, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=BMP+and+TGF-beta+pathway+mediators+are+critical+upstream+regulators+of+Wnt+signaling+during+midbrain+dopamine+differentiation+in+human+pluripotent+stem+cells.">BMP and TGF-beta pathway mediators are critical upstream regulators of Wnt signaling during midbrain dopamine differentiation in human pluripotent stem cells.</a> Dev Biol. 376 (1), 62-73 (2013).</li></ol>

I detta protokoll presenterar vi ett relativt enkelt och tillgänglig metod för att studera neural differentiering av murina ESCs. I tidigare protokoll, till RA till mediet vid dag 2 eller dag 4 av EB hängdropp- 8 eller genom suspensionsodling 7, respektive, eller omedelbart efter EB hängande droppe aggregering 21. I protokollet vi fram var RA lagt tidigare. Trots den tidigare införandet av RA till EBS bildas av suspensionskultur, producerade de...

ESCs härrör från blastocysten inre cellmassan. Dessa celler är pluripotenta, dvs de har förmågan att differentieras till alla celltyper hos organismen ursprungsland. ESC in vitro differentiering är av stort intresse som ett experimentellt system för att utreda utvecklingsvägar och mekanismer. Det erbjuder en potent och flexibel modell för att testa nya terapeutiska metoder för korrigering av cell- och vävnads dysfunktion. EB rekapitulera många aspekter av celldifferentiering under tidig embryogenes. I synnerhet, kan EBs användas när embryonal dödlighet gör det svårt att bestämma den cellulära basen av de embryonala defekter 1, 2. EBs kan bildas antingen av den hängande droppen eller vätskesuspensionstekniker 3. Fördelen av den förra är förmågan att generera EBs av konsekvent storlek och densitet, vilket underlättar experimentell reproducerbarhet. <p class = &quot;jove_content&quot;&gt; Interaktion med extracellulära matrix (ECM) adhesionsproteiner kan påverka motilitet och överlevnad av vidhäftande celler. I 2D-odlingssystemet, är fibronektin ofta tillämpas för att öka cellvidhäftning till substratet. Fibronektin är ett basal lamina komponent som känns igen av 10 typer av cellytan grin heterodimerer 4. RA är en liten lipofil metabolit av vitamin A som inducerar neural differentiering 5, 6. Höga koncentrationer av RA främja neural genexpression och undertrycker mesodermala genuttryck under EB formation 7, 8. RA är producerad av vitamin A oxidation till retinaldehyd genom antingen alkohol eller retinol dehydrogenas, följt av retinaldehyd oxidation till den slutliga produkten genom retinaldehyd dehydrogenas 9. Neural differentiering kräver transport av RA från cytoplasman<html> till kärnan genom cellulär RA-bindande protein 2 (CRABP2). I kärnan, binder RA till dess besläktade receptor komplex bestående av en RAR-RXR heterodimer 10. Detta resulterar i rekrytering av transkriptionella co-aktivatorer, och initieringen av transkription 9, 11. Vidare RA befrämjar nedbrytningen av fosforylerade (aktiva) Smad1, således antagonisera BMP och SMAD signalering 12. Förutom dessa aktiviteter ökar RA Pax6 uttryck, en transkriptionsfaktor som stöder neural differentiering 13. RA-signalering moduleras av sirtuin-1 (SIRT1), en nukleär nikotinamidadenindinukleotid (NAD +) - beroende enzym som deacetylates CRABP2, interferera med dess translokation till kärnan, och således med RA bindning till RAR-RXR heterodimer 14, 15, 16. e_content &quot;&gt; Vårt mål i utformningen av RA-behandlade EB protokoll som beskrivs här är att optimera neural differentiering för att underlätta in vitro-analys av de signalvägar som reglerar ESC differentiering till neuronala prekursorceller. En av fördelarna med detta protokoll är underlättande av analys av cellfunktionen genom immunofluorescens. 3D EBs är inte väl penetrerad av antikroppar och är svåra att bilden. EB dissociation till en 2D monoskikt vid specifika tidpunkter under neural differentiering underlättar immunomärkning och avbildning av cellerna genom konfokalmikroskopi.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td colspan="4">Materials</td>
		</tr>
		<tr>
			<td>MEFs</td>
			<td>EMD Millipore</td>
			<td>PMEF-CF</td>
			<td>ESC feeder layer</td>
		</tr>
		<tr>
			<td>ESC</td>
			<td>EMD Millipore</td>
			<td>CMTI-2</td>
			<td></td>
		</tr>
		<tr>
			<td>Cell culture dish (60 mm)</td>
			<td>Eppendorf</td>
			<td>30701119</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>Cell culture dish (100 mm)</td>
			<td>Falcon</td>
			<td>353003</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>Petri dish (100 mm)</td>
			<td>Corning</td>
			<td>351029</td>
			<td>Hanging drops</td>
		</tr>
		<tr>
			<td>24-well plate</td>
			<td>Greiner Bio-One</td>
			<td>662160</td>
			<td>2D EBs</td>
		</tr>
		<tr>
			<td>6-well plate</td>
			<td>Eppendorf</td>
			<td>30720113</td>
			<td>Transfection</td>
		</tr>
		<tr>
			<td>Dark 1.5 ml centrifuge tube</td>
			<td>Celltreat Scientific Products</td>
			<td>229437</td>
			<td>RA stock solution</td>
		</tr>
		<tr>
			<td>Microscope cover-glass</td>
			<td>Fisherbrand</td>
			<td>12-545-80</td>
			<td>Circular, 12 mm diameter</td>
		</tr>
		<tr>
			<td>Superfrost-plus microscope slides</td>
			<td>Fisherbrand</td>
			<td>12-550-15</td>
			<td></td>
		</tr>
		<tr>
			<td>3D collagen culture kit</td>
			<td>EMD Millipore</td>
			<td>ECM675</td>
			<td>3D culture</td>
		</tr>
		<tr>
			<td>Effectene Transfection Reagent</td>
			<td>Qiagen</td>
			<td>301427</td>
			<td>Stem cell transfection</td>
		</tr>
		<tr>
			<td>Microcon&#160;Centrifugal Filters (10 kDa)</td>
			<td>EMD Millipore</td>
			<td>MRCPRT010</td>
			<td>Protein concentration</td>
		</tr>
		<tr>
			<td>Name&#160;</td>
			<td>Company</td>
			<td>Catalog Number</td>
			<td>Comments</td>
		</tr>
		<tr>
			<td colspan="4">Reagents</td>
		</tr>
		<tr>
			<td>DMEM</td>
			<td>Lonza</td>
			<td>12-709F</td>
			<td>MEFs culture</td>
		</tr>
		<tr>
			<td>IMDM</td>
			<td>Gibco</td>
			<td>12440-046</td>
			<td>ESCs culture</td>
		</tr>
		<tr>
			<td>Fetal bovine serum (FBS)</td>
			<td>EMD Millipore</td>
			<td>ES-009-B</td>
			<td>ESCs culture</td>
		</tr>
		<tr>
			<td>Gelatin</td>
			<td>Sigma-Aldrich</td>
			<td>G2625</td>
			<td>Dish coating</td>
		</tr>
		<tr>
			<td>LIF</td>
			<td>R&#38;D Systems</td>
			<td>8878-LF-025</td>
			<td>To maintain ESC pluripotency</td>
		</tr>
		<tr>
			<td>MEM Non-Essential Amino Acids Solutions</td>
			<td>Gibco</td>
			<td>11140050</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>2-Mercaptoethanol</td>
			<td>Gibco</td>
			<td>21985023</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>Penicillin-Streptomycin</td>
			<td>Gibco</td>
			<td>15140122</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>Gentamicin</td>
			<td>Gibco</td>
			<td>15750060</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>MycoZap Plus-PR</td>
			<td>Lonza</td>
			<td>VZA-2022</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>0.25% Trypsin-EDTA</td>
			<td>Gibco</td>
			<td>25200-072</td>
			<td>Cell culture</td>
		</tr>
		<tr>
			<td>DMSO</td>
			<td>Sigma-Aldrich</td>
			<td>D2650</td>
			<td></td>
		</tr>
		<tr>
			<td>All-trans-retinoic acid</td>
			<td>Sigma-Aldrich</td>
			<td>R2625-50MG</td>
			<td>Induction of neural differentiation</td>
		</tr>
		<tr>
			<td>Bovine Serum Albumin</td>
			<td>Sigma-Aldrich</td>
			<td>A7030-50G</td>
			<td>Blocking and antibody dilution&#160;</td>
		</tr>
		<tr>
			<td>Triton X-100</td>
			<td>Sigma-Aldrich</td>
			<td>T8787-100ML</td>
			<td>Cell membrane permeabilization</td>
		</tr>
		<tr>
			<td>Cell strainer</td>
			<td>Corning</td>
			<td>352360</td>
			<td></td>
		</tr>
		<tr>
			<td>Prolong Gold anti-fade reagent with DAPI</td>
			<td>Life Tech.</td>
			<td>P36931</td>
			<td>Mounting reagent</td>
		</tr>
		<tr>
			<td>16% Paraformaldehyde&#160;</td>
			<td>Electron Microscopy Sciences</td>
			<td>15710</td>
			<td>Cell fixation</td>
		</tr>
		<tr>
			<td>Fibronectin</td>
			<td>R&#38;D Systems</td>
			<td>1030-FN</td>
			<td>Dish coating</td>
		</tr>
		<tr>
			<td>PBS</td>
			<td>Gibco</td>
			<td>10010049</td>
			<td></td>
		</tr>
		<tr>
			<td>Collagenase type I</td>
			<td>Worthington Biochem. Corp</td>
			<td>LS004196</td>
			<td>EB dissociation</td>
		</tr>
		<tr>
			<td>Name&#160;</td>
			<td>Company</td>
			<td>Catalog Number</td>
			<td>Comments</td>
		</tr>
		<tr>
			<td colspan="4">Primary Antibodies</td>
		</tr>
		<tr>
			<td>Nestin (Rat-401)</td>
			<td>Santa Cruz Biotech</td>
			<td>sc-33677</td>
			<td>Detection of neural differentiation</td>
		</tr>
		<tr>
			<td>Oct4</td>
			<td>Santa Cruz Biotech</td>
			<td>sc-5279</td>
			<td>Detection of neural differentiation</td>
		</tr>
		<tr>
			<td>Nanog</td>
			<td>Bethyl Laboratories</td>
			<td>A300-398A</td>
			<td>Detection of neural differentiation</td>
		</tr>
		<tr>
			<td>Sox2</td>
			<td>Cell Signaling</td>
			<td>3579</td>
			<td>Detection of neural differentiation</td>
		</tr>
		<tr>
			<td>Tubulin b3 (AA10)</td>
			<td>Santa Cruz Biotech</td>
			<td>sc-80016</td>
			<td>Detection of neural differentiation</td>
		</tr>
		<tr>
			<td>Name&#160;</td>
			<td>Company</td>
			<td>Catalog Number</td>
			<td>Comments</td>
		</tr>
		<tr>
			<td colspan="4">Secondary Antibodies</td>
		</tr>
		<tr>
			<td>Donkey anti-Mouse-Alexa555</td>
			<td>Life Tech.</td>
			<td>A31570</td>
			<td>Immunofluorescence</td>
		</tr>
		<tr>
			<td>Donkey anti-mouse-Alexa488&#160;</td>
			<td>Life Tech.</td>
			<td>A21202</td>
			<td>Immunofluorescence</td>
		</tr>
		<tr>
			<td>Name&#160;</td>
			<td>Company</td>
			<td>Catalog Number</td>
			<td>Comments</td>
		</tr>
		<tr>
			<td colspan="4">Instruments</td>
		</tr>
		<tr>
			<td>Wide-field microscope</td>
			<td>Nikon</td>
			<td>Eclipse TS100</td>
			<td>Cell culture imaging</td>
		</tr>
		<tr>
			<td>Confocal microscope</td>
			<td>Nikon</td>
			<td>C2</td>
			<td>Immunofluorescence imaging</td>
		</tr>
	</tbody>
</table>

analysis of retinoic acid-induced neural differentiation of mouse embryonic stem cells in two and three-dimensional embryoid bodies

Mus embryonala stamceller (ESC) som isolerats från den inre massan av blastocysten (typiskt vid dag E3.5), kan användas som in vitro-modellsystem för att studera tidig embryonal utveckling. I frånvaro av leukemihämmande faktor (LIF), ESC differentierar som standard till neurala prekursorceller. De kan samlat till en tredimensionell (3D) sfäriska aggregat benämnda embryoid kropp (EB) på grund av dess likhet med det tidiga stadiet embryot. EBs kan ympas på fibronektinbelagda täckglas, där de expanderar genom att odla två dimensionella (2D) förlängningar, eller implanteras i 3D kollagenmatriser där de fortsätter att växa som sfäroider, och differentierar till de tre groddblad: endodermala, mesodermala och ektodermalt. 3D collagen kulturen härmar in vivo miljö närmare än 2D EBS. 2D EB kulturen underlättar analys genom immunofluorescens och immunoblotting att spåra differentiering. Vi har utvecklat en tvåstegs neural differentieringtion-protokollet. I det första steget, är EBs genereras av hängdropp- teknik, och, samtidigt, induceras att differentiera genom exponering för retinsyra (RA). I det andra steget, neurala differentieringsfortskrider i en 2D- eller 3D-format i frånvaro av RA.

Oct4, Nanog och SOX2 är kärntranskriptionsfaktorer som ger ESC självförnyelse och pluripotens. Vi tillämpade ovanstående protokoll för att jämföra den neurala differentieringen av ESCs från vildtyp och från en stam av genetiskt modifierade möss där Syx, en gen som kodar för det RhoA specifika utbyte faktor Syx, störs. Vi hade inblandad Syx i angiogenes 18. Vi märkte skillnader i beteenden EBS aggregerade från Syx + / +...

Watch this Scientific Journal Video about Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies at JoVE.com

Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies

Vi beskriver en teknik för användning av murina embryonala stamceller för generering av två eller tre dimensionella embryoidkroppar. Vi förklarar sedan hur man framkalla neural differentiering av embryoida kroppens celler av retinoinsyra och hur man analyserar deras tillstånd av differentiering av stamceller markör immunofluorescens och immunoblotting.

Analys av retinsyra-inducerade Neural differentiering av Mouse embryonala stamceller i två och tre-dimensionella Embryoid organ

Mouse embryonic stem cells (ESCs) isolated from the inner mass of the blastocyst (typically at day E3.5), can be used as in vitro model system for ...

Research

JoVE Journal

Developmental Biology

Deriving Retinal Pigment Epithelium (RPE) from Induced Pluripotent Stem (iPS) Cells by Different Sizes of Embryoid Bodies

Deriving Retinal Pigment Epithelium RPE from Induced Pluripotent Stem iPS Cells by Different Sizes of Embryoid Bodies

Härrör näthinnans pigmentepitel (RPE) från inducerade pluripotenta stamceller (iPS) Celler med olika storlekar av Embryoid organ

Pluripotent stem cells possess the ability to proliferate indefinitely and to differentiate into almost any cell type. Additionally, the development of ...

Differentiation of a Human Neural Stem Cell Line on Three Dimensional Cultures, Analysis of MicroRNA and Putative Target Genes

Differentiering av en mänsklig Neural Stem Cell Line den Tredimensionell kulturer, Analys av MicroRNA och Förmodade målgenerna

Neural stem cells (NSCs) are capable of self-renewal and differentiation into neurons, astrocytes and oligodendrocytes under specific local ...

Neural Differentiation of Mouse Embryonic Stem Cells in Serum-free Monolayer Culture

Neural differentiering av Mouse embryonala stamceller i Serumfri enskiktskultur

The ability to differentiate mouse embryonic stem cells (ESC) to neural progenitors allows the study of the mechanisms controlling neural specification as ...

Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues

Epigenetisk reglering av hjärt Differentiering av embryonala stamceller och vävnader

Specific gene transcription is a key biological process that underlies cell fate decision during embryonic development. The biological process is mediated ...

Prediction and Validation of Gene Regulatory Elements Activated During Retinoic Acid Induced Embryonic Stem Cell Differentiation

Förutsägelse och validering av Gene reglerande element aktiveras under retinsyra Induced embryonala stamceller Differentiering

Embryonic development is a multistep process involving activation and repression of many genes. Enhancer elements in the genome are known to contribute to ...

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

Regisserad differentiering av primitiv och slutgiltig hematopoetiska progenitorceller från mänskliga pluripotenta stamceller

One of the major goals for regenerative medicine is the generation and maintenance of hematopoietic stem cells (HSCs) derived from human pluripotent stem ...

Horizontal Whole Mount: A Novel Processing and Imaging Protocol for Thick, Three-dimensional Tissue Cross-sections of Skin

Horisontell helmontering: Ett nytt bearbetnings- och bildprotokoll för tjocka, tredimensionella vävnads tvärsnitt av huden

Processing a tissue of interest to generate a microscopic image that supports a scientific argument can be challenging. The acquisition of high-quality ...

Rapid, Directed Differentiation of Retinal Pigment Epithelial Cells from Human Embryonic or Induced Pluripotent Stem Cells

Snabb, regisserad differentiering av Retinal Pigment epitelial celler från mänskliga embryonala eller inducerade pluripotenta stamceller

We describe a robust method to direct the differentiation of pluripotent stem cells into retinal pigment epithelial cells (RPE). The purpose of providing ...

Generation of Scaffold-free, Three-dimensional Insulin Expressing Pancreatoids from Mouse Pancreatic Progenitors In Vitro

Generation of Scaffold-free, Three-dimensional Insulin Expressing Pancreatoids from Mouse Pancreatic Progenitors In Vitro

Generation av byggnadsställning-fri, tredimensionella Insulin att uttrycka Pancreatoids från mus bukspottskörteln föräldraparets In Vitro

The pancreas is a complex organ composed of many different cell types that work together to regulate blood glucose homeostasis and digestion. These cell ...

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

Computational analys av den Caenorhabditis elegans könsceller att studera fördelningen av atomkärnor, proteiner och cytoskelettet

The Caenorhabditis elegans (C. elegans) germline is used to study several biologically important processes including stem cell development, apoptosis, and ...